1. all shops in mtl close at 5pm sharp! Be there early
2. eaton centre and the undgerground are all connected. the underground shopping centre starts from place montreal trust to the bay. It's particularly good in the winter time.
3. i would suggest u shop in St.Denis street. its european style is really beautiful in the summer time. there are many special shops with may side walk cafte. afterall, it's nice to stay away from shopping malls for a while.